The video below shows differently though as the 991 Turbo S is actually able to ultimately pull up top. Quite impressive for a stock car. What explains this? The lighter weight of the 991 chassis is definitely a factor. Additionally, it would appear at least in this video that the tune on the 997 Turbo is not the strongest. It is said to have a tune from Speed-Concept that puts it in the 565 horsepower range and the 991 Turbo S is rated at 560 stock.

Once the 991 Turbos get tuned it looks like they will be stronger than their 997 counterparts at least in tune only guise.

That was unexpected! Especially, since a tuned car at the same power usually has the advantage. Like it was said above, the weight of the S and the tune of the 997 have to be the causes for this outcome. What does the turbo S dyno at stock? Sticky if u don't stay with BMW in the future this could possibly be a new monster that can be in the garage!!